Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 96,554	$ 87,990	$ 279,101	$ 331,509
Unrealized gains and losses on debt securities:
Change in unrealized holding gains and losses, net	(151,753)	(271,079)	(145,601)	(1,202,341)
Less: Reclassification adjustment for net (gains) losses included in net income	(154)		279
Amortization of net unrealized loss on securities transferred from available-for-sale to held-to-maturity	10,268	12,587	30,563	25,708
Change in unrealized gains and losses on debt securities	(141,639)	(258,492)	(114,759)	(1,176,633)
Unrealized gains and losses on derivative hedges:
Change in unrealized gains and losses on derivative hedges, net	3,927	3,321	4,248	12,438
Less: Reclassification adjustment for net gains included in net income	(2,844)	(1,470)	(8,065)	(3,411)
Change in unrealized gains and losses on derivative hedges	1,083	1,851	(3,817)	9,027
Other comprehensive loss, before tax	(140,556)	(256,641)	(118,576)	(1,167,606)
Income tax benefit	34,016	62,184	28,940	282,032
Other comprehensive loss	(106,540)	(194,457)	(89,636)	(885,574)
Comprehensive (loss) income	$ (9,986)	$ (106,467)	$ 189,465	$ (554,065)